The worlds easiest Octopus heat pump install

[Swwils]

I tried that but HA only gets you have an integer otherwise it fails.

The install team were wonderful but the cosy 9 has a ridiculous 70Hz vibration that’s reverberating throughout my house so you could not run it at night or you would never sleep. Hopefully they come up with a fix, apparently running it in should help but I suspect direct piping may be the cause, so possibly they will switch to flexis, it will be a absolute show stopper otherwise.

Part of me thinks it’s from the air intake, where it’s having to bend to get out at the angle, a very distinctive fan blades chopping type vibration.

[lwis (Lewis Juggins)]

They seem to use flexi pipes sporadically, my Cosy 6 has them, vibration transfer is minimal apart from at maximum speeds.

[Swwils]

The installers said that on cosy Flexi are optional but they are mandated on the Daikin.

It just must be a very unfortunate resonance but it transferred 3 stories up into bedrooms very effectively .

Again can’t fault the install team in any way they were amazing.

[agileoctopus (Jonathan)]

How annoying. I’ve got a spare set of flexis from my installation which I rescued from the skip pile. (For some reason they had two?!). Magpied a load of other stuff from the skip pile too.

[John (John Gouk)]

yeah my scrap pile/van clear out came up with a huge reel of Cat6 cable, some waterproof boxes and lots of handy flexible piping!

[Swwils]

Ive got a pair of 750mm flexis here, but Octopus will sort some shorter ones I think

I’ve had a few more runs of the unit now, I had a good one with almost no vibration at 6000W heat output. So it seems to be a vibration from the fan itself not the compressor (the fan speed was way lower on this run) and only when its really going for it, almost like a “chop chop” booming reverb type sound behind the unit. Maybe this fan is not well balanced or the intake geometry of the cosy 9 is a bit “taller” and causing some weirdness. Feeling a bit better that its actually solvable now I experienced the low vibration run.

I was also very surprised by the material over-allocation; easily like £600 worth of stuff was unused, I just let them take it.

The cosy hub web interface has some interesting engineer and manufacture only menus.

Ive still had no luck with HA → emoncms even if I rename the input node to an integer like 19 it still doesnt work.

[mcwill (Iain McWilliams)]

@Swwils

Ive still had no luck with HA → emoncms even if I rename the input node to an integer like 19 it still doesnt work.

I’ve tried altering my HA config to specify an input node id that doesn’t exit on emoncms and this then gets created by the first write, so something else is up with your settings.

Can I check you are using the read/write key listed under input api help?

[Swwils]

Thanks for looking, I did a manual get via browser and it added the test node ID I used (301) like you described. Yes i’m using the right read/write API key.

https://emoncms.org/input/post?node=301&fulljson={"example_data":12345}&apikey=************************)

I’m not exactly sure how to get debug logs from a core HA component, but i don’t know why its not working.

The sensor looks valid to me also.

I’m quite impressed with the heatpumps performance. It seems to have a 3 minute heavy start up, then takes about 10 mins to get to a target return temp, then modulates very nicely. Its not cold enough here to try it for long though. If they can sort the vibration ill be well impressed with it.

[Swwils]

Ok I found how to get debug logs.

2025-05-18 02:55:22.624 ERROR (SyncWorker_17) [homeassistant.components.emoncms_history] Error saving data '{sensor.octopus_energy_heat_pump_00_1e_5e_09_02_ba_5a_f0_live_outdoor_temperature:11.3}' to 'https://emoncms.org/input/post.json'

Looks to me like the core component is not formatting it into valid json?

payload = ",".join(f"{key}:{val}" for key, val in payload_dict.items())

Its using string formatting looks like and forgets to quote the keys.

[mcwill (Iain McWilliams)]

Maybe the colons in the sensor name or the length of it also looks quite long. Can you remove it and for a test replace with another sensor with a short name?

You’re getting closer

[Robert.Wall]

I have a hazy memory that there is both a length limit for the name and a restriction on the character set. Sorry, but I can’t remember either when or where I saw it, or even whether is was sending to or receiving by emonCMS.

[Swwils]

Ok I shortened it and something happen.

Desktop mode success!!!

[Bill.Thomson]

@Robert.Wall

I have a hazy memory that there is both a length limit for the name and a restriction on the character set.

I recall seeing something similar:

Permitted characters (eg. '@') in Inputs names?

I’m in the process of loading historic data from rayleighconnect. As a first step I used the suggestion from Posting data in the emonCMS user guide to create the Inputs. Rayleigh identify sensors with identifiers like “e2.freq”,“e2.i3p@1”,“e2.i3p@2”,“e2.i3p@3” so I decided to use “Rayleigh” as the node and keep those identifiers. My first attempt used the identifiers as is but the ‘@’ didn’t appear in emonCMS. My next attempt replaced the ‘@’ with ‘%40’ and used a URL like this: http://127.0.…

Specifically, this part of the thread:

The following characters are denoted as reserved, i.e. they have special meanings.

! # $ & ' ( ) * + , / : ; = ? @ [ ]

Don’t know if that’s what you were referring to, but it seems close.

[Robert.Wall]

I’ve just turned up this:

About the input api.. Does it accept http post?

I thought someone would have a quick answer for this but it seems not … so i dug in the sources… The answer is YES it supports http post but it is not documented for some reason on the input api page and it doesn’t accept every parameter in the post data. what i saw in the sources is that you can specify http://192.168.0.101:8083/emoncmsnew/input/post.json?node=1&data={sensor1:200,sensor2:400,sensor3:4.5} which is exacltly the same as http://192.168.0.101:8083/emoncmsnew/input/post.json?node…

Maybe my brain conflated the two?

It would be nice if limitations like these got transferred to the permanent documentation.

[Marko_Cosic]

@Swwils

The installers said that on cosy Flexi are optional but they are mandated on the Daikin.

If the unit were hard mounted to a concrete mass (not free to vibrate on what looks to be a paving slab over rocks) and they piped it up with “hard” pipe but in a “Z” dogleg you might get away with hard pipe.

As installed it appears that you have a washing machine on a loose wobbly base (paving slab on top of some rocks? or is that actually a concrete pad that the unit is hard bolted to?) that’s anchored to the inside of your house using hard copper pipes as the only restraint?

If it’s fan balance or unstable airflow - shedding vortices off something in the vicinity would do it - try lighting a BBQ nearby and watching the smoke patterns - that’s something diffrent entirely. The fact it transfers upstairs suggest pipe borne noise though.

[Swwils]

It’s layers of MOT1, then postcrete then the slab, the rocks are just decorative ontop, it’s then through bolted.

It sounds like a resonance upstairs somewhere 70-80Hz.

If needs be I could tie it to the retaining wall toe, but I don’t want to do that encase it couples it even more.

[Swwils]

Had a very interesting visit from a senior engineer, it’s going to get sorted, they are very happy about the monitoring data, in very happy with the approach to try solve source of issue first.

The person the sent had worked all the way back with the RED units so had considerable knowledge. Apparently very early versions of the cosy had a monolithic PCB.

Not installed the flexis yet, hopefully going to have some other solution. Could possibly be the fan is involved.

Previous hot water runs cost me about 6.3p/kWh on gas about 14kwh a day. (£1.20ish.) Now doing for 4-5x8p..so about 32p a day. Magic really

[agileoctopus (Jonathan)]

What COP are you getting on DHW? Have you managed to get onto heatpumpmonitor yet?

[Swwils]

Its on heatpumpmonitor.

Emoncms - app view

I’ve not been around to get it set properly (I still don’t know how much HW I can get out of a 50C 300L tank yet), so been doing boosts.

[Andre_K (André Kühne)]

Very nice. Looks like the outside temperature sensor is affected a bit by the cooled air leaving the heat pump, can you move it?